Mike Walker: Geology and Ice – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2008 > Mike Walker: Geology a...

Mike Walker: Geology and Ice

Mike Walker is Professor Emeritus of Quaternary Science at University of Lampeter, UK, and has worked intensively with reconstruction of the nature and chronology of environmental change during the late Quaternary period, and with the human/landscape interactions in western Britain. Recently, he has led a working group with participants from Centre for Ice and Climate, formulating a now-ratified proposal defining the base of the Holocene (in geology: The present) from NGRIP Greenland ice core data. JP and Sigfus has collaborated with Mike through INTIMATE in the past 15 years.
Mike Walker is visiting Centre for Ice and Climate at the Niels Bohr Institute, University of Copenhagen, and will give a talk on stratigraphic classification and the link to ice cores:

Friday October 10, 13:30
Rockefeller Auditorium, Juliane Maries Vej 30, 2100 Kbh. Ø

Geology and Ice
- Quaternary Stratigraphic Subdivision and the Ice-core Record

The talk discusses the classification of the Quaternary System/Period and examines the potential of ice core-records as a basis for stratigraphic subdivision. It will focus on the major geological boundaries within the Quaternary: the base of the Pleistocene, the Lower-Middle Pleistocene boundary (LMPB), the Middle-Upper Pleistocene boundary (MUPB), and the Pleistocene-Holocene Series/Epoch boundary.
Recent attempts to define reference sections (Global Stratotype Sections and Points: GSSPs) for the LMPB and MUPB will be examined. The value of ice-core sequences in Quaternary classification and subdivision is best exemplified by the proposal, recently formulated by a joint working group of INTIMATE (Integration of ice-core, marine and terrestrial records) and the Subcommission for Quaternary Stratigraphy (SQS), that the GSSP for the base of the Holocene should be defined in the NGRIP Greenland ice core. Full details of this proposal, which has recently been ratified by the International Union of Geological Sciences (IUGS), will be presented.